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The UltraCarry preparation method concentrates any aqueous liquid sample on a specially designed absorbent pad that is mounted on a Mylar film, which is stretched across a rigid plastic disk. This unusual sample holder (Figure 1) allows the Rigaku ZSX Primus II WDXRF spectrometer to do a standard water type analysis in only a few minutes and attain values at the ppb level, which rival the competitive ICP analysis method for sensitivity- while offering a reduced preparation time, sample quantity, and waste.

Figure 1

SPEX LPC Standard 1 is an aqueous liquid sample that contains 20 ppm concentrations of a full suite of elemental components, along with a few spiked addition elements at 100 ppm and 5 ppm. 500 microliters of liquid sample was deposited and then dried (60°C for 45 min.) on the UltraCarry holder. The sample was then run through the "standardless" SQX analysis software on the Rigaku ZSX Primus II Spectrometer under a vacuum atmosphere. The resulting semi-quantitative spectral scan (Figure 2) and results (Chart 1) from the sample are shown below.

The Lower Limits of Detection (LLD) for this standard are calculated, based on a 100-second count time per element and a power signature of 2.5 kW, and reported in ppb units. As the data states, the sensitivity-increasing UltraCarry method for analyzing aqueous liquids allows a standard like SPEX LPC 1 to be reported at levels that rival ICP techniques.

ZSX Primus II features an innovative optics-above configuration. Never again worry about a contaminated beam path or down time due to sample chamber maintenance. The optics-above geometry eliminates cleaning worries and increases up time.Read more about ZSX Primus II...

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